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authortrav90 <travawine@protonmail.ch>2018-04-26 16:49:15 -0500
committertrav90 <travawine@protonmail.ch>2018-04-26 16:49:15 -0500
commit8b37a1bc306c1d5a3cc92e9dc04fb95d5d9a0298 (patch)
treec37da5241afd7cda6f92d394e14cef7d5dcbb4e5 /media/ffvpx/libavcodec/get_bits.h
parent56a2df6b25bc93ea9a59b8e0bf8029f752f68573 (diff)
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[ffvpx] Update ffvp9/ffvp8 to 3.4.2-release
Structure of code was slightly modified so that it should be no longer necessary to re-generate the config_*.h files, greatly simplifying the resync process in the future.
Diffstat (limited to 'media/ffvpx/libavcodec/get_bits.h')
-rw-r--r--media/ffvpx/libavcodec/get_bits.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/get_bits.h b/media/ffvpx/libavcodec/get_bits.h
index 0f183e035..0c7f5ff0c 100644
--- a/media/ffvpx/libavcodec/get_bits.h
+++ b/media/ffvpx/libavcodec/get_bits.h
@@ -229,6 +229,20 @@ static inline int get_xbits(GetBitContext *s, int n)
return (NEG_USR32(sign ^ cache, n) ^ sign) - sign;
}
+static inline int get_xbits_le(GetBitContext *s, int n)
+{
+ register int sign;
+ register int32_t cache;
+ OPEN_READER(re, s);
+ av_assert2(n>0 && n<=25);
+ UPDATE_CACHE_LE(re, s);
+ cache = GET_CACHE(re, s);
+ sign = sign_extend(~cache, n) >> 31;
+ LAST_SKIP_BITS(re, s, n);
+ CLOSE_READER(re, s);
+ return (zero_extend(sign ^ cache, n) ^ sign) - sign;
+}
+
static inline int get_sbits(GetBitContext *s, int n)
{
register int tmp;
@@ -331,6 +345,7 @@ static inline void skip_bits1(GetBitContext *s)
*/
static inline unsigned int get_bits_long(GetBitContext *s, int n)
{
+ av_assert2(n>=0 && n<=32);
if (!n) {
return 0;
} else if (n <= MIN_CACHE_BITS) {
@@ -369,6 +384,10 @@ static inline uint64_t get_bits64(GetBitContext *s, int n)
*/
static inline int get_sbits_long(GetBitContext *s, int n)
{
+ // sign_extend(x, 0) is undefined
+ if (!n)
+ return 0;
+
return sign_extend(get_bits_long(s, n), n);
}
@@ -531,6 +550,7 @@ static inline const uint8_t *align_get_bits(GetBitContext *s)
* @param max_depth is the number of times bits bits must be read to completely
* read the longest vlc code
* = (max_vlc_length + bits - 1) / bits
+ * @returns the code parsed or -1 if no vlc matches
*/
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
int bits, int max_depth)